peters



N. PETERS. PHOTO UTHDGRAF waited @States para cnw.

A. W. ALMQVIST AND F. W. OFELDT, 0F NEW-YORK, N. Y

Letters Patent No. 99,518, lated February 8, 1870.

cUT-QFF VALVE-GEAR..

The Schedule referred to in these Letters Patentand making part of thesame.

To all 'whom it may concen'n:v

Beit known that we, A. W. ALMQvIs'r and F. W. OFELDT, of the city,county, and State of New York, have invented a new and improvedMechanical Movement and we do-hereby declare that the followingis afull, clear, and exact description thereof, which will enable othersskilled in the art to make and use the same.

This invention has for its object to furnish a new and improvedmechanical movement, applicable for operating the valve or cut-off ofsteam-engines, gas and water-meters, and all other engines in which thepressnre of a gaseous orliquid body is employed as motor, as also in allother kinds of machinery, where an oscillating or reciprocating motion,'vith uniform or variable stroke may be combined with (to regulate'or beregulated by) an intermittent motion, of any length ofstroke, and ofvariable or constant length of time of rest at either end of its stroke;and

It consists in combination of the various parts, as will be hereinafterdescribed.

ln the accompanying drawings, forming part of this specificationr Figure1, (Sheet 1,) represents a` front or face view of our improvedmechanical movement.

, Figure 2, (Sheet 1,) a sectional side view of tig. 1.

Figures 3 and 5, (Sheet 11,) and Figure 7, (Sheet 111,) represent faceviews of modifications ofthe same movement.

Figure 4, (Sheet 1I,) and Figures 6 and 8, (Sheet 111,) are sectionalside viewsof tigs3, 5, and?, respectively.

Similar letters of reference indicate like or equiva lent parts.-

A is an axle, which may beV connected with machinery movable, by thepressure cfa gas or liquid, or by other power. 4

B is a spring, attached to said axle A, either directly, or by thecollar or sleeve a', movable on the axle A, which motion may beregulated by the screws a",

lon the projections b of the collar l1,tl1e latter being securelyfastened, by a pin, or otherwise, to the axle or shaft A. n n C is theaxle or fulcrum of aI taire, or other device, -to which an intermittentmotion is to be imparted through the spring B.

D is thelever of motion, acting on the fulcrum C. Said lever D isprovided with'a pin, ll', connected with spring B. v y

E is a stop-plate, curved orinclinedon its workingsurface, and of alength corresponding to the desired distance of motion of the pin d. v v

nstead of the plate E,may be used inclined catches stop-pin F, duringmotion of thepin d', expands at the end of the stroke, retaining thestop-pin F at rest at the ends of the stop-plate E, until released bythe bending of the spring B.

The spring G may be attached either to the stoppin F,.(as in figs. 1, 2,7, and 8,) or to the stop-plate E, (as in figs. 3, 4, 5, and 6.)

The length of contact between the stop-pin and stopplate, and therebythe time of rest of the pin el of the lever D, after completed stroke,as also thetension ofthe spring B, to suit its work, are regulated bythe screw-thread and nut H, which may be made either as a part of thestop-pin F, (as in figs. l, 2, 3, 4,) or separat-ely, (as in figs. 56,7, 8.)

The operation is as follows:

, Supposing, for illustration, that A is a' rock-shaft,

oscillated by connection with a reciprocating piston, and that thelever 1) is working a valve, alternately reversing its connection withsupply and discharge ports. The movement of the axlein the direction ofthe arrow l, (figs. l, 3, 5,) bends the spring B, which, heilig thusbent, rises above the contact ot' the stops, when, expanding, itreverses the position of the lever l), and `the valve operated, therebychanging the po- .ried.

Said` stroke may be further increased, without increasing the ilex'ionof the' spring B, by unscrewing the set-screws c, in the lugs of thecollar b', a greater or lesser distance out of contact with theprojections c on the collar a.-

In the case of slow velocity, and where the move? ment, constructed asshown' in igs. l and 2, is placed vertically, the spring G may bedispensed with, as the weight ofthe stop-pin F is suicient to cause itto fall, after passing the ends of the stop-plate E.'

Claims.

Having thus described our invention,

E, or equivalent, and stop-pin I", with or wthoutvthe What We claim asnew, and desire to secure by Leta, with the sleeve or collar a',substantially as shown ters Patent, is and for the purpose set forth.

1. A mechanical movement, composed of the 'ol- The above specificationof ohr invention signed by lowing elements: The springr B, lever'D,stop-plate us, this 24th day of September, 1869.

A. XV. ALMQVIST.

spring G, in combination with the axles or fuk-,rn F. YV. OFELDT. AandC, substantially as described and shown, for Witnesses: the purposesset forth. CHARLES H. NASH,

2. The combination of the collar b', and set-screws CEAS. NIDA.

